BIOL-242 Lecture Notes - Lecture 61: Prostatic Urethra, Vas Deferens, Seminal Vesicle
16 Jun 2020
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Chapter 27 part 3 | the male accessory glands & sexual. On posterior bladder surface; smooth muscle contracts during ejaculation. Fructose, citric acid, coagulating enzyme (vesiculase), and prostaglandins. Duct of seminal vesicle joins ductus deferens to form ejaculatory duct. Encircles urethra inferior to bladder; size of peach pit; smooth muscle contracts during ejaculation. Contains citrate, enzymes, and prostate-specific antigen (psa) Bacterial infection; acute and chronic; treated with antibiotics. May be age-related; distorts urethra; treated with surgery, microwaves, drugs, balloon compression, radio-frequency radiation. Second most common cause of cancer death in males. Treated with surgery and sometimes radiation; castration; drugs. In clinical trials - cryosurgery, chemotherapy, ultrasound, proton beam therapy stimulates thecal cells to produce androgens. Produce thick, clear mucus during sexual arousal. Neutralizes traces of acidic urine in urethra. Milky-white mixture of sperm and accessory gland secretions. 2 5 ml semen ejaculated, contains 20 150 million sperm/ml. Contains fructose for atp production; protects and activates sperm; facilitates sperm movement.
